Practice Question

1.State the approx size in μm of an animal cell

20-30μm

2.A cell has a size of 100μm. Convert the 100μm into cm.

μm to cm: divide by 10,000

100/10,000 = 0.01cm

3. Write these numbers in standard form

3a. 120,0000

1.2 x 10⁶

3b. 0.00000016

1.6 x 10^-7

4. A plant cell has a size of 100μm, whilst a bacterial cell has a size of 1μm. How many orders of magnitude larger is the plant cell compared to the bacterial cell.


Plant cell is 100 times larger than the bacterial cell, so it is 2 orders of magnitude larger